Unlocked Anroid 5.1 Phones TSJYING(TM) 4.5" MTK6580 Quad Core ROM 4GB Dual Camera Dual SIM Dual Standby GSM/3G Quadband WIFI Bluetooth Dual Standby Black Unlocked Dual Sim Smartphone, with Android 5.1 Lollipop 4.5" FWVGA Display (480 x 854) CUP:MTK6580 Quad Core 1.3GHz ; GPU:Mali-400MP ; RAM&ROM: 512MB + 4GB ROM Dual Camera:Back-camera : 2.0MP;Front camera: 0.3MP 3G (WCDMA 850/2100) and 2G Quad Band(GSM 850/900/1800/1900) network , please buy the GSM/WCDMA SIM card. Do not buy the CDMA SIM card from them.